Bike: 2012 Specialized Crux
Averages
Speed: 15-16.5mph
Distance:25-30 miles
Rides Per Week: 2-3
Cruising speed:18-20mph
While I understand why you ask for an average speed I personally find the "cruising" speed more useful. By cruising speed I mean the speed I maintain if able to ride without stops. So say I was on a mup or something and I was riding at an odd hour and I didn't have to stop of slow down, that would be my cruising speed.